CSX, Amtrak, and MBTA Trains at Canton Junction with Amtrak Inspection Cars and B733! 4K

I was joined by Trains2U18 for about half the time. After having a rainy day on Monday, we decided to head out to Canton Junction to see some high speed Amtrak trains. It happened to be that we picked a good day to be on the Northeast corridor. First, we saw a decent amount of Amtrak trains with good horn shows. With CSX B733 in the picture taking an unusual route, I stayed as long as possible. Luckily, there were some other interesting things coming my way. After Trains2U18 left, I saw a few more Amtrak trains on Track 1 (the outbound platform), and then decided I should probably switch tracks to get a good picture of the Amtrak inspection cars on the rear of 172. The inspection cars were 10005 (Catenary Measurement) and 10002 (Corridor Clipper), the track Geometry car. As I was switching from Platform A to Platform D, the train approaching signs went off. At first I thought it was a commuter rail; when I saw a CSX rounding the curve, I tried my best to get my camera out as fast as possible and keep it as st